1.non
2.thats cheap
3.raise the level of you receiver to a level that you will mostlikely listen to...round -20 - -15 and bring the spl up to the range that the spl reads your volume
4. see 3
5.
6. until you have a source/music/movie that pushed below your crosover setting you won't notice a difference. If you set it to small it should pushs all frequencies below your crossover setting.
7. As with some receivers the output driven with 2 channels is higher than with all channels driven. Some brands cheat with power output. For instance in the past receivers say it is 100w x 5... but in actuality when 2 channels driven it is 100w. When all channels driven it is actaully about 72w with all 5 channels. Sony,Denon,Onkyo,Pioneer.
Based on past reviews usually Rotels, NAD, HK and Yamaha rated their power conservatively and did actually advertised the rating of the 5,6 or 7 channels driven. For instance my old Rotel receiver said it was 100w x 5. When all channels were driven it was around 102w x 5. With 2 channels driven it was running 123w x 2.
Based on a past review the HK 4550 is advertised at 50w x 6 channels at 8 ohms
When they measured the output it came out to 95w x 2 channels. 75w @ 5 channels
http://www.homecinemachoice.com/cgi-bin/displayreview.php?reviewid=3343
